What will come in place of the question mark $(?)$ in the following letter-group series based on the English alphabet?
$WC, RE, NI, KO, ?$

Arrange the given words in alphabetical order and choose the one that comes in the middle.

Arrange the given words in alphabetical order and choose the one that comes in the middle.

Each of the following questions is based on the following alphabet series.
$A, B, C, D, E, F, G, H, I, J, K, L, M$
$N, O, P, Q, R, S, T, U, V, W, X, Y, Z$
If the alphabet is written in the reverse order and every alternate letter starting with $Y$ is dropped,which letter will be exactly in the middle of the remaining letters of the alphabet?

If the letters of the word $HANDOVER$ are arranged alphabetically from left to right,how many letters will remain at the same position?

$A$ group of letters is given which are numbered $1, 2, 3, 4, 5$ and $6$. Below are given four alternatives containing combinations of these numbers. Select the combination of numbers so that the letters arranged accordingly form a meaningful word.
$E, H, R, A, S, P$
$1, 2, 3, 4, 5, 6$